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Taxonomical Resolution and Distribution of Bacterioplankton Along the Vertical Gradient Reveals Pronounced Spatiotemporal Patterns in Contrasted Temperate Freshwater Lakes.
- Source :
-
Microbial ecology [Microb Ecol] 2018 Aug; Vol. 76 (2), pp. 372-386. Date of Electronic Publication: 2018 Jan 16. - Publication Year :
- 2018
-
Abstract
- We examined the relationship between viruses and co-occurring bacterial communities across spatiotemporal scale in two contrasting freshwater lakes, namely meromictic Lake Pavin and dimictic Lake Aydat (Central France). Next-generation sequencing of 16S rRNA genes suggested distinct patterns in bacterioplankton community composition (BCC) between the lakes over depths and seasons. BCC were generally dominated by members of Actinobacteria, Proteobacteria, and Bacteroidetes covering about 95% of all sequences. Oxygen depletion at the bottom waters in Aydat and existence of permanent anoxia in the monimolimnion of Pavin resulted in the occurrence and dominance of lesser known members of lake communities such as Methylotenera, Methylobacter, Gallionella, Sulfurimonas, and Syntrophus in Pavin and Methylotenera and Sulfuritalea in Aydat. Differences in BCC appeared strongly related to dissolved oxygen concentration, temperature, viral infection, and virus-to-bacteria ratio. UniFrac analysis indicated a clear distinction in BCC when the percentage of viral infected bacterial cells and virus-to-bacteria ratio exceeded a threshold level of 10% and 5, respectively, suggesting a link between viruses and their potential bacterial host communities. Our study revealed that in both the lakes, the prevailing environmental factors across time and space structured and influenced the adaptation of bacterial communities to specific ecological niches.
- Subjects :
- Actinobacteria classification
Actinobacteria genetics
Bacteria genetics
Bacteriophages
Bacteroidetes classification
Bacteroidetes genetics
Biodiversity
Ecosystem
France
Lakes chemistry
Microbiota genetics
Plankton genetics
Proteobacteria classification
Proteobacteria genetics
RNA, Ribosomal, 16S genetics
Seasons
Temperature
Bacteria classification
Lakes microbiology
Phylogeny
Plankton classification
Water Microbiology
Subjects
Details
- Language :
- English
- ISSN :
- 1432-184X
- Volume :
- 76
- Issue :
- 2
- Database :
- MEDLINE
- Journal :
- Microbial ecology
- Publication Type :
- Academic Journal
- Accession number :
- 29340714
- Full Text :
- https://doi.org/10.1007/s00248-018-1143-y